Four 2 kg masses are connected by 1/4 m spokes to an axle as in
figure given below. A force F of 24 N acts on a lever 1/2 m long
to produce an angular acceleration a. The magnitude of a (in
rad/sec ) is :
(1) 24
(2) 12
(3) 6
(4) 3

Astone is dropped from the upper observation deck of a tower, 250 m above the ground. (assume g = 9.8 m/s2.) (a) find the distance (in meters) of the stone above ground level at time t. h(t) = (b) how long does it take the stone to reach the ground? (round your answer to two decimal places.) s (c) with what velocity does it strike the ground? (round your answer to one decimal place.) m/s (d) if the stone is thrown downward with a speed of 2 m/s, how long does it take to reach the ground? (round your answer to two decimal places.) s